Commit e638ee1d authored by Edward Cree's avatar Edward Cree Committed by David S. Miller

sfc: handle failure to allocate TSOv2 contexts

If we fail to init the TXQ because of insufficient TSOv2 contexts,
try again with TSOv2 disabled.
Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e9117e50
...@@ -2178,9 +2178,6 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) ...@@ -2178,9 +2178,6 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue)
/* TSOv2 is a limited resource that can only be configured on a limited /* TSOv2 is a limited resource that can only be configured on a limited
* number of queues. TSO without checksum offload is not really a thing, * number of queues. TSO without checksum offload is not really a thing,
* so we only enable it for those queues. * so we only enable it for those queues.
*
* TODO: handle failure to allocate this in the case where we've used
* all the queues.
*/ */
if (csum_offload && (nic_data->datapath_caps2 & if (csum_offload && (nic_data->datapath_caps2 &
(1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_TSO_V2_LBN))) { (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_TSO_V2_LBN))) {
...@@ -2193,15 +2190,6 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) ...@@ -2193,15 +2190,6 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue)
MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_TARGET_EVQ, channel->channel); MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_TARGET_EVQ, channel->channel);
MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_LABEL, tx_queue->queue); MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_LABEL, tx_queue->queue);
MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_INSTANCE, tx_queue->queue); MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_INSTANCE, tx_queue->queue);
MCDI_POPULATE_DWORD_3(inbuf, INIT_TXQ_IN_FLAGS,
/* This flag was removed from mcdi_pcol.h for
* the non-_EXT version of INIT_TXQ. However,
* firmware still honours it.
*/
INIT_TXQ_EXT_IN_FLAG_TSOV2_EN, tso_v2,
INIT_TXQ_IN_FLAG_IP_CSUM_DIS, !csum_offload,
INIT_TXQ_IN_FLAG_TCP_CSUM_DIS, !csum_offload);
MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_OWNER_ID, 0); MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_OWNER_ID, 0);
MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_PORT_ID, nic_data->vport_id); MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_PORT_ID, nic_data->vport_id);
...@@ -2217,10 +2205,30 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) ...@@ -2217,10 +2205,30 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue)
inlen = MC_CMD_INIT_TXQ_IN_LEN(entries); inlen = MC_CMD_INIT_TXQ_IN_LEN(entries);
rc = efx_mcdi_rpc(efx, MC_CMD_INIT_TXQ, inbuf, inlen, do {
NULL, 0, NULL); MCDI_POPULATE_DWORD_3(inbuf, INIT_TXQ_IN_FLAGS,
if (rc) /* This flag was removed from mcdi_pcol.h for
goto fail; * the non-_EXT version of INIT_TXQ. However,
* firmware still honours it.
*/
INIT_TXQ_EXT_IN_FLAG_TSOV2_EN, tso_v2,
INIT_TXQ_IN_FLAG_IP_CSUM_DIS, !csum_offload,
INIT_TXQ_IN_FLAG_TCP_CSUM_DIS, !csum_offload);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_INIT_TXQ, inbuf, inlen,
NULL, 0, NULL);
if (rc == -ENOSPC && tso_v2) {
/* Retry without TSOv2 if we're short on contexts. */
tso_v2 = false;
netif_warn(efx, probe, efx->net_dev,
"TSOv2 context not available to segment in hardware. TCP performance may be reduced.\n");
} else if (rc) {
efx_mcdi_display_error(efx, MC_CMD_INIT_TXQ,
MC_CMD_INIT_TXQ_EXT_IN_LEN,
NULL, 0, rc);
goto fail;
}
} while (rc);
/* A previous user of this TX queue might have set us up the /* A previous user of this TX queue might have set us up the
* bomb by writing a descriptor to the TX push collector but * bomb by writing a descriptor to the TX push collector but
......
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